Python 3.10.9 (tags/v3.10.9:1dd9be6, Dec  6 2022, 20:01:21) [MSC v.1934 64 bit (AMD64)] on win32
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>>> a=0
>>> b=1
>>> sums=0
>>> for _ in range(51):
...     sums +=a
...     a,b = b,a+b
... 
...     
>>> print(sums)
32951280098
